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Offshore wind power steel pipe socketed pile and pile outside grouting construction method

A technology of offshore wind power and rock-socketed piles, which is applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as unsatisfactory grouting effects and difficult construction, and achieve high piling efficiency, convenient operation, and sufficient grouting effects

Pending Publication Date: 2017-06-30
HUADIAN HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of difficult construction and unsatisfactory grouting effect in the prior art, the present invention proposes an offshore wind power steel pipe rock-socketed pile that is convenient for construction and can ensure effective combination of the pile wall and the rock wall through underwater grouting, including steel pipe Pile body, within the length of the steel pipe pile body in the rock-socketed depth range, the grout outlets are evenly arranged at equal intervals, and the grout outlets are provided with one-way grouting valves from the inside to the outside, and the outside of the grout outlets wrapped rubber gasket

Method used

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  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method
  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method
  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method

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Embodiment 1

[0024] The embodiment of the present invention provides an external grouting construction process for offshore wind power steel pipe rock-socketed piles. In the grouting construction process, a grout outlet is set on the steel pipe pile body of the rock-socketed section, and multiple grouting conduits are arranged from the ground to the grout outlet. It is convenient for construction and can ensure the effective combination of the pile wall and the rock wall through underwater grouting.

[0025] Specifically as figure 1 , image 3 As shown, the embodiment of the present invention provides an offshore wind power steel pipe rock-socketed pile 100, which includes a steel pipe pile body 110, and within the length of the steel pipe pile body within the rock-socketed depth range, the slurry outlets 111 are evenly arranged at equal intervals , The grout outlet 111 is provided with a one-way grouting valve from inside to outside, and the outside of the grout outlet 111 is wrapped wit...

Embodiment 2

[0032] Based on the above-mentioned offshore wind power steel pipe rock-socketed pile, the present invention also provides a method for grouting outside the pile, including the following steps:

[0033] Step 1: Carry out drilling construction with a drilling rig, drill the hole to the design depth, perform the first hole cleaning, and then sink the pile foundation of the offshore wind power steel pipe rock-socketed pile to the design depth. When there is a weak layer on the upper part of the seawater bottom layer, the offshore wind power steel pipe rock-socketed pile is piled. When the pile penetrates into the hard rock layer, the drilling machine is drilled from the inner diameter of the pile to the bottom of the pile. The radius is greater than the radius of the pile body, and the drilling depth reaches the design bearing layer to stop.

[0034] Step 2: Carry out the second hole cleaning, remove the residue at the bottom end of the offshore wind power steel pipe rock-sockete...

Embodiment 3

[0037] The embodiment of the present invention provides an offshore wind power steel pipe rock-socketed pile external grouting construction process, including the following steps: Step 1, such as Figure 4 As shown, within the length of the steel pipe piles in the rock-socketed depth range, at a height of 3 meters apart, each layer is evenly arranged with 10 slurry outlets (according to the pile diameter and embedded The slurry outlets are arranged in depth, and the injection control area of ​​each slurry outlet is 4m 2It is advisable), and the pulp outlet is arranged in the form of plum blossoms as the height changes. A one-way valve device from the inside to the outside is installed on the grout outlet, and the outside of the grout outlet is wrapped with a rubber gasket to protect the grouting conduit port; Step 2, the pile sinking method of the steel pipe pile in the grouting construction process of the large-diameter steel pipe rock-socketed pile described In order to car...

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Abstract

The invention relates to an offshore wind power steel pipe socketed pile which comprises a steel pipe pile body, pulp discharging openings are uniformly distributed in the steel pipe pile body length within the rock-socketed depth range at an equal interval, the pulp discharging openings are provided with one-way grouting valves from inside to outside, and the outer sides of the pulp discharging openings are wrapped with rubber gaskets. The invention furthermore relates to a pile outside grouting construction method. The method includes the following steps that (1), drilling construction is performed with a drilling machine to the designed depth, primary hole cleaning is performed, and then the pile foundation of the offshore wind power steel pipe socketed pile is made to sink to the designed depth; (2), secondary hole cleaning is performed, residuals at the pile bottom end of the offshore wind power steel pipe socketed pile are removed, a guide pipe is put down to be connected into the one-way grouting valves, and underwater grouting of concrete is started. The pile driving efficiency is high, grouting is complete, the pile wall and the rock wall can be combined effectively, and operation is convenient to perform.

Description

technical field [0001] The invention relates to the field of offshore platform construction, in particular to an offshore wind power steel pipe rock-socketed pile and a method for grouting construction outside the pile. Background technique [0002] In the coastal area, the geological conditions are complex, the seabed reefs, sand ridges, sand dunes, and ravines criss-cross, and the geological conditions in different regions vary greatly. . Based on this complex geological situation, the wind turbine foundation of offshore wind power projects needs to adopt the foundation form of steel pipe rock-socketed piles. The existing rock-socketed pile grouting technology is mostly applied to bored piles, that is, the drilling operation is carried out earlier, the steel casing retaining wall is placed in the hole, and then the grouting operation is carried out. However, for wind power foundations, using cast-in-situ piles as single pile foundations requires a large amount of groutin...

Claims

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Application Information

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IPC IPC(8): E02D27/42E02D15/04E02D5/38
CPCE02D5/38E02D15/04E02D27/425E02D2250/003
Inventor 贾沼霖袁新勇王小合张星波逯鹏刘玉飞张健翔孔德煌张康余刚张清涛郝利忠
Owner HUADIAN HEAVY IND CO LTD
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